function formatJson(txt, compress /*是否为压缩模式*/ ) { /* 格式化JSON源码(对象转换为JSON文本) */
    var indentChar = '    ';
    if (/^\s*$/.test(txt)) {
        alert('数据为空,无法格式化! ');
        return;
    }
    try { var data = eval('(' + txt + ')'); } catch (e) {
        alert('数据源语法错误,格式化失败! 错误信息: ' + e.description, 'err');
        return;
    };
    var draw = [],
        last = false,
        This = this,
        line = compress ? '' : '\n',
        nodeCount = 0,
        maxDepth = 0;

    var notify = function(name, value, isLast, indent /*缩进*/ , formObj) {
        nodeCount++; /*节点计数*/
        for (var i = 0, tab = ''; i < indent; i++) tab += indentChar; /* 缩进HTML */
        tab = compress ? '' : tab; /*压缩模式忽略缩进*/
        maxDepth = ++indent; /*缩进递增并记录*/
        if (value && value.constructor == Array) { /*处理数组*/
            draw.push(tab + (formObj ? ('"' + name + '":') : '') + '[' + line); /*缩进'[' 然后换行*/
            for (var i = 0; i < value.length; i++)
                notify(i, value[i], i == value.length - 1, indent, false);
            draw.push(tab + ']' + (isLast ? line : (',' + line))); /*缩进']'换行,若非尾元素则添加逗号*/
        } else if (value && typeof value == 'object') { /*处理对象*/
            draw.push(tab + (formObj ? ('"' + name + '":') : '') + '{' + line); /*缩进'{' 然后换行*/
            var len = 0,
                i = 0;
            for (var key in value) len++;
            for (var key in value) notify(key, value[key], ++i == len, indent, true);
            draw.push(tab + '}' + (isLast ? line : (',' + line))); /*缩进'}'换行,若非尾元素则添加逗号*/
        } else {
            if (typeof value == 'string') value = '"' + value + '"';
            draw.push(tab + (formObj ? ('"' + name + '":') : '') + value + (isLast ? '' : ',') + line);
        };
    };
    var isLast = true,
        indent = 0;
    notify('', data, isLast, indent, false);
    return draw.join('');
}
